Missing features

[ameba23]

• Read auxblob which has supplementary output data

• Check that provider is tdx_guest and give an error otherwise

• Check the generation number - from the docs:

The value in this attribute increments each time @inblob or any option is written. Userspace can detect conflicts by checking generation before writing to any attribute and making sure the number of writes matches expectations after reading @outblob, or it can prevent conflicts by creating a report instance per requesting context.

• Could potentially write a privlevel privilege value
• Consider writing service_provider
• Consider writing service_guid
• Consider writing service_manifest_version